U.S. patent number 3,577,991 [Application Number 04/797,971] was granted by the patent office on 1971-05-11 for sewing tissue instruments or the like.
Invention is credited to Guilbert Roland Wilkinson.
United States Patent |
3,577,991 |
Wilkinson |
May 11, 1971 |
SEWING TISSUE INSTRUMENTS OR THE LIKE
Abstract
A forceps or like instrument having a covering shield attached
to each member or leg at its pivoted end so as to cover any opening
between engaging surfaces or projection at or about where each
member or leg pivots, so that thread or the like employed with the
forceps will be prevented from dropping into an opening between the
surfaces or about the projections on the forceps.
Inventors: |
Wilkinson; Guilbert Roland
(Hamilton, NZ) |
Family
ID: |
19916616 |
Appl.
No.: |
04/797,971 |
Filed: |
February 10, 1969 |
Foreign Application Priority Data
|
|
|
|
|
Nov 12, 1968 [NZ] |
|
|
154,454 |
|
Current U.S.
Class: |
606/206; 606/207;
81/416; 606/208 |
Current CPC
Class: |
A61B
17/2812 (20130101); A61B 17/062 (20130101); B25B
7/16 (20130101); B25B 7/18 (20130101); B25B
7/08 (20130101) |
Current International
Class: |
A61B
17/28 (20060101); A61B 17/04 (20060101); B25B
7/16 (20060101); B25B 7/00 (20060101); B25B
7/08 (20060101); B25B 7/18 (20060101); A61b
017/04 (); B25b 007/06 () |
Field of
Search: |
;30/134,135,266
;81/415,416,417,5.1 ;128/321,322,323,324,340,346,326,334 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Pace; Channing L.
Claims
I claim:
1. In a forceps or the like comprising a pair of members each of
which has a jaw and a handle portion, and means pivotally securing
said members together for opening and closing movement of the jaws
relative to each other about an axis upon manipulation of the
handle portions; the improvement comprising a pair of shields
fixedly secured to opposite sides of the forceps one on each said
member, each said shield being a thin, flat strip of material that
extends from over the jaw of one member, across the other member at
said axis, and terminates over the handle portion of said one
member, one end of the strip being secured to the jaw of said one
member.
Description
This invention relates to improvements in sewing tissue instruments
such as needle-holding forceps.
In suturing or stitching tissue together, when the needle is passed
through the tissue to be sewn the needle end of the thread is
passed several times around the body of the forceps, (generally
three times), and then the other end of the thread is gripped by
jaws of the forceps. This end of the thread is then drawn through
loops thus made, and the two ends are pulled together to tighten
the thread against the tissue.
To complete a knot, one or more turns can be made around the body
of the forceps reversewise to the first several, e.g. three loops.
The ends are again pulled tight to complete the knot against
tissue. This can be repeated if desired.
It has been found that it is while sliding the loops down the body
of the forceps that the thread will snag on the slightest
projection on or crack formed by the positioning of parts of the
forceps.
The hinge part of any present needle-holding or suturing forceps is
made so that when the forceps are opened to grip the thread that
has passed through the sides of the wound, the cracks or opening
surfaces between parts of the forceps become wider and the thread,
on numerous occasions, is trapped and snagged when the forceps are
closed. This prevents the free running of the thread, so the knot
to seal the wound cannot be completed, or sometimes even
started.
The object of the present invention is to provide a forceps or like
instrument having such a construction and/or arrangement of its
parts that will ensure of the thread or other sewing material not
snagging on a hinge joint or on any point of the instrument when
suturing or stitching, providing a free-running surface for the
suturing material.
Generally the invention consists of a forceps or like instrument
having a covering shield attached to each member or leg at its
pivoted end so as to cover any opening between engaged surfaces or
projection at or about where each member or leg pivots so that
thread or the like employed with the forceps will be prevented from
dropping into an opening between surfaces or about projections of
the forceps.
In further describing the construction and function of the
invention, reference will be made hereinafter to the accompanying
drawing in which:
FIG. 1 is a perspective plan view of the forceps in the closed
position,
FIG. 2 is a similar view of a main part of the forceps in an opened
position,
FIG. 3 is a side view of the forceps, and
FIG. 4 is an enlarged cross section taken on the line 4-4 in FIG.
1.
In giving effect to the invention, as a preferred embodiment, the
forceps generally consists of two members 10, 11 of a relatively
narrow cross section, which members are pivoted together upon a
screw 12 towards their outer ends or jaws 13, 14 and a spring 15 is
set between the members 10, 11 to normally hold such outer ends or
jaws open. These jaws 13, 14 open fairly widely relative to one
another and are formed so as to take and grip the fine surgical
thread employed.
Dependent upon this opening is each forceps member 10 or 11 formed
by being cut back to allow for the mutual cooperation of the other
member. In this respect is the length of the shield 16 of each
member determined.
Preferably the shield 16 of each member is made of a suitable thin
material such as fine gauge sheet copper strip, stainless steel or
any suitable metal or plastic material. This strip has a width to
suit the side of each forceps member, in plan view, and the strip
is gradually curved at its ends to a narrowed extremity. This can
be effected after the strip has been positioned along the member 10
or 11 over the pivot screw 12 and brazed, welded or silver-soldered
to the member. The joints are then ground and polished off to suit
the periphery of the cross section of the member at the localities
of the joints and so as to give a very smooth finish.
Each member 10 or 11 having such a shield, the latter extends
across openings between pivot areas of the members.
Thus the thread 17 on being employed with my improved forceps
cannot be trapped or snagged, but slides easily down to the end of
the forceps, and the free end of the thread can now be pulled
through the loops as earlier mentioned to make the first and second
part of the knot.
Finally it is to be understood that the term "forceps" is intended
to include all needle-holding forceps as Gillies, Hegar, Mosquito,
Spencer Wells, etc., or any instrument used in the sewing of
wounds, or eye-suturing forceps, or those used in tying surgeons
knots or other kinds of knots for tying up tissues.
It is pertinent to this patent that where desired all
needle-holding forceps can be adapted by having the snagproof
shield fitted to them. In the manufacture of new needle-holding
forceps the hinge may be ground down on each side so that the
shield may fit in more snugly and so not make the shield part
thicker.
Instead of the screw 12, a plain pin or axle for the hinge can be
held in place by the shields 15 on both sides of the members or
legs.
* * * * *